Schedule: a typical summer Sunday (the flights of Jul 26, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
FRONTIER · FLIGHT F9 2678
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4 Tomorrow
F9 2678 · SFO → ONT
departs 9:33 AM PT · arrives 11:07 AM PT
Forecast issued Sat 6:00 PM ET · 19h before departure
Watch this flight
Other days
Today 25%
Sun 10/4
Mon 10/5 24%
Tue 10/6 17%
Fri 10/9 27%
Odds over time
Arrive at ONT more than 15 minutes late?
24%
chance · ±1 pts
+2 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
24%
Leave 15+ late
22%
Arrive 1h+ late
10%
Cancelled
1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
5.6d
2d
1d
Now
12h
6h
Departs
Lands
Arrive at ONT more than 15 minutes late?
Calm-weather odds: 26% · changed +2 pts in 24h
+2 pts
24%
Yes 24%
No 76%
Leave SFO more than 15 minutes late?
Calm-weather odds: 23% · changed +6 pts in 24h
+6 pts
22%
Yes 22%
No 78%
Arrive at ONT more than an hour late?
Calm-weather odds: 9% · changed +1 pt in 24h
+1 pt
10%
Yes 10%
No 90%
Cancelled?
Calm-weather odds: 1% · changed +0 pts in 24h
+0 pts
1%
Yes 1%
No 99%
How late will it get to ONT?
On time or early
75%
15–30 min late
6%
30 min–1 hour late
8%
1–2 hours late
6%
Over 2 hours late
4%
Cancelled
1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
F9's recent on-time record
↑
This flight has been late 39% of the time recently
↑
SFO is prone to delays
↓
Mostly benign weather forecast at SFO
↓
Mostly benign weather forecast at ONT
Weather at each end
SFO (origin)
Gusts 12 kt Ceiling none (clear) Visibility 10+ mi Precip none
ONT (destination)
Gusts 16 kt Ceiling none (clear) Visibility 10+ mi Precip none
How this resolves
Yes if the gate arrival is more than 15 minutes after the scheduled arrival. Cancelled or diverted flights resolve N/A.
Every question here is display only — there is no betting or money involved. Gate times come from the airline; a cancellation resolves only the “Cancelled?” question, and a diversion voids the delay questions.